Mistral Medium 3.5 vs Grok 4.1 Fast
Mistral AI against xAI, costed on the same three workloads. Grok 4.1 Fast is cheaper on all three workloads.
Monthly bill, side by side
| Workload | Mistral Medium 3.5 | Grok 4.1 Fast | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$6,041 | $3,516 | $2,526 (1.7×) |
| Document summariser 1,000 single-shot summaries a day |
$729 | $518 | $211 (+41%) |
| Coding agent 200 twelve-turn sessions a day |
$4,212 | $2,835 | $1,377 (+49%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Mistral Medium 3.5 | Grok 4.1 Fast | |
|---|---|---|
| Input, per 1M tokens | $1.5 | $1.25 |
| Output, per 1M tokens | $7.5 | $2.5 |
| Cached input | $0.15 | $0.2 |
| Context window | 262K | 2M |
| Maximum output | 262K | 2M |
| Reasoning model | no | yes |
| Vision | yes | yes |
Run this comparison on your own numbers
Full detail: Mistral Medium 3.5 pricing · Grok 4.1 Fast pricing